Gases compounds
Gases: molar mass meets the ideal gas law
Methane, propane, butane, CO, CO₂, SO₂, NO, NH₃, and HCl(g) appear in combustion, atmosphere, and industrial synthesis problems. Gas density problems need molar mass: denser gases than air have higher M. Always distinguish formula mass of the molecule (CO vs CO₂) from elemental atomic mass.
Use CH₄, C₃H₈, and C₄H₁₀ for fuel stoichiometry; use CO vs CO₂ for oxidation-state comparisons.
- Gas
Carbon Dioxide
CO₂ · 44.01 g/mol
- Base
Ammonia
NH₃ · 17.03 g/mol
- Acid
Hydrochloric Acid
HCl · 36.46 g/mol
- Gas
Carbon Monoxide
CO · 28.01 g/mol
- Gas
Sulfur Dioxide
SO₂ · 64.06 g/mol
- Hydrocarbon
Methane
CH₄ · 16.04 g/mol
- Hydrocarbon
Butane
C₄H₁₀ · 58.12 g/mol
- Hydrocarbon
Propane
C₃H₈ · 44.10 g/mol
- Gas
Nitric Oxide
NO · 30.01 g/mol
- Acid
Hydrofluoric Acid
HF · 20.01 g/mol